Water Detection in Multiphase Flows Using Electromagnetic Sensors
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Solution Overview
Problem
Existing technologies face challenges in accurately determining the presence and salinity of water in multiphase flows, particularly in oil-gas wells, where the flow regimes are complex and the pressure conditions vary significantly.
Innovation Solution
The implementation of a water detection manager apparatus that utilizes electromagnetic sensors to measure the permittivity and conductivity of multiphase flows at high data acquisition rates, enabling the detection of water presence and salinity within the flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic sensors are used to measure permittivity and conductivity at high data acquisition rates, then water detection accuracy is improved, but device complexity increases
Solution Approach 1:
The system segments the water detection function by separating the electromagnetic sensing component from the data processing component. The electromagnetic sensors measure permittivity and conductivity independently, while a separate processing system analyzes the high-rate data to detect water presence and salinity, reducing overall device complexity while maintaining detection accuracy
Solution Approach 2:
The electromagnetic sensors serve multiple functions: they measure both permittivity and conductivity simultaneously, detect water presence, and determine salinity levels. This multi-functionality reduces the need for separate sensors for each measurement, thereby reducing device complexity while improving comprehensive water detection accuracy
2Reliability
If real-time monitoring of multiphase flows is implemented, then flow assurance is improved, but energy consumption increases
Solution Approach 1:
The system implements periodic sampling of electromagnetic measurements at high rates, but processes and transmits data at lower intervals. This periodic action maintains real-time monitoring capability for flow assurance while reducing continuous energy consumption of data processing and transmission systems
Solution Approach 2:
The electromagnetic sensors and processing system are designed to operate autonomously in the harsh multiphase flow environment, requiring minimal external intervention or calibration. This self-service capability reduces the energy consumption associated with manual maintenance, calibration, and system management, thereby improving flow assurance with lower overall energy input
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively detects the presence of water in multiphase flows, improving the accuracy of flow rate measurements and enhancing flow assurance by providing real-time alerts for potential hydrate formation and corrosion risks.
Implementation Method 1
determining a maximum permittivity and a minimum permittivity during the time period
Implementation Method 2
determining a maximum conductivity and a minimum conductivity during the time period
Data Source
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AI summary
Methods and apparatus for detecting water in multiphase flows are disclosed. An example apparatus includes a conduit including an inlet to receive a multiphase flow and an electromagnetic sensor coupled to a liquid-rich region of the conduit to measure a permittivity of the multiphase flow, and a water detection manager to determine that water is detected in the multiphase flow based on the permittivity.